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fix(bmi270): make burst write size configurable #566

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Merged
finger563 merged 5 commits into from
Dec 2, 2025
Merged

fix(bmi270): make burst write size configurable #566

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9acdfb3
fix(bmi270): make burst write size configurable to prevent stack over…
Concode0 Nov 30, 2025
67eb33a
fix: change default burst size to 0
Concode0 Nov 30, 2025
ee1f215
Update components/bmi270/include/bmi270.hpp
finger563 Dec 2, 2025
327238c
Update components/bmi270/include/bmi270.hpp
finger563 Dec 2, 2025
96b46ba
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finger563 Dec 2, 2025
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14 changes: 11 additions & 3 deletions components/bmi270/include/bmi270.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -85,6 +85,12 @@ class Bmi270 : public espp::BasePeripheral<uint8_t, Interface == bmi270::Interfa
nullptr; ///< Read function
ImuConfig imu_config; ///< IMU configuration
filter_fn orientation_filter = nullptr; ///< Filter function for orientation
/**
* @brief Maximum number of bytes to write in a single burst during config upload.
* Default is 0 (uses full config file size of 8192 bytes).
* Decrease this if you encounter stack overflow (e.g., 128 for ESP32-C3).
*/
uint16_t burst_write_size = 0;
bool auto_init{true}; ///< Automatically initialize the BMI270
Logger::Verbosity log_level{Logger::Verbosity::WARN}; ///< Log level
};
Expand All @@ -94,7 +100,8 @@ class Bmi270 : public espp::BasePeripheral<uint8_t, Interface == bmi270::Interfa
explicit Bmi270(const Config &config)
: BasePeripheral<uint8_t, Interface == bmi270::Interface::I2C>({}, "Bmi270", config.log_level)
, orientation_filter_(config.orientation_filter)
, imu_config_(config.imu_config) {
, imu_config_(config.imu_config)
, burst_write_size_(config.burst_write_size == 0 ? config_file_size : config.burst_write_size) {
if constexpr (Interface == bmi270::Interface::I2C) {
set_address(config.device_address);
}
Expand Down Expand Up @@ -565,9 +572,9 @@ class Bmi270 : public espp::BasePeripheral<uint8_t, Interface == bmi270::Interfa
}

// upload config file:
// - burst write 8 kB init data to INIT_DATA, using 128-byte writes
// - burst write init data to INIT_DATA, using configurable chunk size (defaults to 8 kB)
const uint8_t *config_data = config_file;
size_t burst_size = config_file_size;
size_t burst_size = burst_write_size_;
size_t config_size = config_file_size;
size_t offset = 0;
while (offset < config_size) {
Expand Down Expand Up @@ -706,6 +713,7 @@ class Bmi270 : public espp::BasePeripheral<uint8_t, Interface == bmi270::Interfa
// Member variables
filter_fn orientation_filter_{nullptr};
ImuConfig imu_config_{};
uint16_t burst_write_size_{0};
Value accel_values_{};
Value gyro_values_{};
float temperature_{0.0f};
Expand Down